source: src/spectral/constantq.h @ 81fe7d30

/*
  Copyright (C) 2017 Paul Brossier <piem@aubio.org>

  This file is part of aubio.

  aubio is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  aubio is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with aubio.  If not, see <http://www.gnu.org/licenses/>.

*/

/** \file

  Constant-Q Transform

  TODO add long description

  \example spectral/test-constantq.c

*/

#ifndef AUBIO_CONSTANTQ_H
#define AUBIO_CONSTANTQ_H

#ifdef __cplusplus
extern "C" {
#endif

/** Constant-Q transofmr object

  This object computes the forward Constant-Q transform.

*/
typedef struct _aubio_constantq_t aubio_constantq_t;

/** create new constant-Q computation object

  \param size length of the Constant-Q
  \param samplerate sampling rate of the input signal
  \param bins_per_octave number of bins per octave

*/
aubio_constantq_t * new_aubio_constantq(uint_t size, uint_t samplerate,
        uint_t bins_per_octave);

/** compute constant-Q

  \param s constant-Q object as returned by new_aubio_constantq
  \param input input fft grain
  \param cqt_output transformed input array

*/
void aubio_constantq_do (aubio_constantq_t *s, const cvec_t * input,
        fvec_t * cqt_output);

/** delete constant-q object

  \param s constant-q object as returned by new_aubio_constantq

*/
void del_aubio_constantq (aubio_constantq_t *s);

/** get number of output bins of a constant-q object

  \param s constant-q object as returned by new_aubio_constantq
  \return number of output bins

*/
uint_t aubio_constantq_get_numbins (aubio_constantq_t *s);

#ifdef __cplusplus
}
#endif

#endif /* AUBIO_CONSTANTQ_H */